Just thought I would mention that the time frame they state is for when you BOOKED THE FLIGHTS not when you travelled.
Also you are going to have to give details of actual surcharge paid and booking reference.
This is going to be very difficult, but I guess that is their aim as Virgin say the claims are not going through them so they will not help.
I have flown twice a year in those time frames, but can only prove 1 with e ticket on an email as previous to that they used to issue actual tickets and who keeps the actual tickets after 3 years! I like most of us have the dates that I travelled, but it does not seem as if that is enough. Nevertheless I am going to claim for at least the 1 flight I can prove with all the details on the e ticket just to prove the point.